Analysis of surface transient temperature on large current carrying high-speed sliding electrical contact

Abstract

Single-step fabrication of bionic-superhydrophobic surface using reciprocating-type high-speed wire cut electrical discharge machining Chinese Science Bulletin 59, 3691 (2014); Static mechanics analysis of no bumping or vibration welding structure applied in high-speed & heavy-load CWR with single inclined surface SCIENCE CHINA Technological Sciences 53, 3153 (2010); Static mechanics analysis of no bumping no vibration welding structure with double-inclined surface for high-speed & heavy-load CWR SCIENCE CHINA Technological Sciences 54, 603 (2011); A rapid response micro-thermocouple used for transient temperature measurement of high-speed gas flow

Simulation of electrical contact wear on the rough surfaces of ultra-high-voltage transmission line fittings

“…where R j is the contact resistance, R s is the constriction resistance, ρ 0 is the resistivity of the friction pair material, H is the Brinell hardness of the material (N/m 2 ), ζ is the introduced parameter to characterize the deformation, ζ ∈ (0.3, 1), n is the number of conductive spots and is estimated by experience. 24 The area of a single contact point can be expressed as follows 23 :…”

“…Assuming that contact points are evenly distributed on the contact surface and are regularly circular, and 10 contact points exist per 4 mm 2 , and the contact point radius can be determined. 24 The contact resistance is assumed to be constant during friction and wear. The contact resistance heat flux is expressed as follows:…”

“…where 13) into (11), because oxidation only occurs on a part of the friction contact surface, the oxidation coefficient of the contact surface η is introduced, and the volume wear caused by oxidation is expressed as follows:…”

“…Huo et al 9 and Guo et al 10 simulated the friction temperature field of the pantograph catenary electrical contact through the Joule heat physical field module of COMSOL Multiphysics and subsequently analyzed the temperature field change characteristics of the sliding electrical contact surface. Zhang et al 11 calculated the electric contact heat flow and applied it to the contact surface of the model and subsequently used ANSYS finite element software to analyze the transient temperature field change during the armature electric contact process. Kharin et al 12 established a mathematical model of heat transfer in electrical contact and detailed arc erosion.…”

Progress on Current-Carry Friction and Wear: An Overview from Measurements to Mechanism

“…The current-carrying friction pair is in a complex environment of an electromagnetic field, temperature field, and stress coupling field, and its performance will also show coupling characteristics. The heat generated in the dry friction process directly damages the contact surface, destroys the current-carrying friction and wear state, and affects the electrical conductivity of the friction pair [102][103][104]. The arc, resistance, and oxidation in the process of conducting electricity affects the characteristics of the friction pair, which determines that the pressure, speed, and other factors not only directly affect the tribological performance of the current-carrying friction pair, but also affect the conductive characteristics of the current-carrying friction pair.…”